Allen-Bradley
Rockwell/Allen-Bradley 1771-DCM Direct Communication Module
In stock, ready to ship
Manufacturer: Allen-Bradley
Product No.: 1771-DCM
Product Type: Communication Module
Product Origin: USA
Payment: T/T
Weight: 900g
Shipping port: Xiamen
Warranty: 12 months
Yes, we provide a 30-day money-back guarantee for all purchases.
Yes, all items come with a 12-month warranty from the date of shipment.
Allen-Bradley 1771-DCM
Direct Communication Module for PLC-5 Systems
Overview
The 1771-DCM (Direct Communication Module) is a communication interface designed for use in Allen-Bradley PLC-5 systems. It enables high-speed, peer-to-peer data exchange between PLC processors across different chassis without relying on the Data Highway network.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Catalog Number | 1771-DCM |
| Product Type | Direct Communication Module |
| Communication Type | Peer-to-peer processor communication |
| Supported Processors | PLC-5 family |
| Communication Speed | Up to 57,600 bps |
| Communication Method | Trunkline/Dropline or Daisy Chain |
| Switch Configuration | DIP switch banks for mode and address settings |
| Status Monitoring | Status word with bit-level diagnostics |
| Mounting | 1771 I/O chassis |
| Power Supply | Backplane powered |
| Compatible Chassis | 1771-A1B through A4B |
Dimensions and Weight
| Attribute | Specification |
|---|---|
| Module Width | Standard single-slot 1771 format |
| Weight | 0.9 kg |
| Mounting Type | Rack-mounted |
| Cooling Method | Passive (natural convection) |
Product Questions
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Q: What is the function of the 1771-DCM?
A: It enables direct, high-speed communication between PLC processors without using the Data Highway network. -
Q: What are typical applications for the 1771-DCM?
A: Used in distributed control systems where multiple PLCs need to exchange data reliably and quickly. -
Q: How is communication configured?
A: Via DIP switch banks and cable connections (trunkline/dropline or daisy chain), with status bits available for diagnostics. -
Q: Is the module compatible with all PLC-5 processors?
A: Yes, it supports supervisory and local processor roles across the PLC-5 family.